The field experiment was carried out at Bako Agriculture Research Center, during 2017 with the objectives of evaluating the effect of maize-soybean intercropping and blended NPS on yields and yield traits of the component crops. The experiment was laid out in RCBD with three replication in factorial combination of three planting densities of soybean (25%, 50% and 75%) and four fertilizer rate (0, 50, 100 and 150 kg/ha). BH 546 (maize) and Didesa (soybean) varieties used. Interaction effect of the intercropped maize significantly (P<0.05) affected number of ears per plant, hundred kernel weight and GY of maize. The highest hundred kernel weight (33.67g) was obtained for 50% soybean population with 100kg NPS-rate. The highest LAI (72.75) was obtained from 50% soybean population and all plant population except 25% produced more than one ear per plant. Grain yield (tha-1) of maize was significantly affected by soybean populations and fertilizers and highly significantly affected by interaction effect. The highest grain yield (1.77) was obtained for 0kgNPS-rate and 25% soybean populations. Grain yield (t ha-1) of soybean was highly significantly affected by main effect of plant population, interaction effect. The highest (0.164) grain yield was recorded for 150kg NPS-rate with 50% soybean population. Considering experimental findings 25% soybean population and 50 kg NPS ha-1 was recommended for the study area.